How to add URL parameter to wordpress site for hide some section

scripts.js

(function ($) {
	"use strict";

    jQuery(document).ready(function($){
      
        // For hiding section which is not needed at app
        var headerSelector = "#masthead"; // header
        var footerSelector = "#colophon"; // footer
        var blogMenu = ".blog_menu_area"; // blogmenu
        var blogSidebar = ".blog_sidebar"; // blog sidebar
        var recentPost = ".featured_post_area"; // blog sidebar
        var blogCta = ".cta_wrapper"; // blog cta
        var blogPostComments = ".single_post_comments"; // blog post comment
        var blogRating = "#wpd-post-rating"; // blog post comment

        if(window.location.search.indexOf("app=true") !== -1) {
            $(headerSelector).hide();
            $(footerSelector).hide();
            $(blogMenu).hide();
            $(blogSidebar).hide();
            $(recentPost).hide();
            $(blogCta).hide();
            $(blogPostComments).hide();
            $(blogRating).hide();
        }
        
    });

}(jQuery));